ConvertFrom-Markdown.ps1
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function ConvertFrom-Markdown { <# .Synopsis Converts from markdown to HTML format .Description Converts from the lightweight markup format Markdown into HTML .Link http://daringfireball.net/projects/markdown/ .Link http://en.wikipedia.org/wiki/Markdown .Example ConvertFrom-MarkDown ' # Heading # ## Subheading ### Another Subheading ### Header 1 ========= Header 2 -------- *** --- *italics* * * * **bold** - - - _moreitalics_ - - - __morebold__ ****** Some text with `some code` inline some code plain old indented code ! [Show Logo](http://show-logo.com/?Show-Logo_Text=Show-Logo&Show-Logo_RandomFont=true) ! [Show Logo][2] [wikipedia](http://wikipedia.org) [start-automating][1] [start-automating][] -------- [1]: http://start-automating.com/ [2]: http://show-logo.com/?Show-Logo_Text=Show-Logo&Show-Logo_RandomFont=true [start-automating]: http://start-automating.com/ ' #> [OutputType([string])] param( # The Markdown text that will be converted into HTML #|LinesForInput 20 [Parameter(Mandatory=$true,ValueFromPipeline=$true,ValueFromPipelineByPropertyName=$true,Position=0)] [Alias('Md')] [String]$Markdown, [Parameter(Position=1)] # If set, will convert links to Write-Link. # This will automatically embed richer content #|Float [Switch]$ConvertLink, [Parameter(Position=3)] # If set, will convert PRE tag content into colorized PowerShell [Switch]$ScriptAsPowerShell, [Parameter(Position=2)] # If set, will recognize @{} as an embedded object, and will show the data in that object with Out-HTML. #|Float [Switch]$ShowData, # If set, will splat embedded data to run commands [Switch]$Splat ) process { if ($ShowData) { $markdown = [Regex]::Replace($markdown, "\`$(\w{1,})", { $text = $args[0].Groups[1].ToString() if ($text -ieq 'pipeworksmanifest') { return ('$' + $args[0].Groups[1]) } # If it's castable to a double, it's probably a currency, not a variable if ($text -as [Double]) { return ('$' + $text) } if ($text -ieq 'true') { return ('$' + $true) } if ($text -ieq 'false') { return ('$' + $false) } if ($text -like "*username*" -or $text -like "*password*" -or $text -like "*secret*" -or $Text -like "*key*" -or $text -eq "home") { return ('$' +$args[0].Groups[1]) } $v = $ExecutionContext.SessionState.PSVariable.Get($text) if ($v) { if ($v.Value -is [string] -or $v.Value -is [int] -or $v.Value -is [float]) { $scriptHtml = $v.Value } else { $scriptHtml = $v.Value | Out-HTML } } else { $scriptHtml ="" } if ($scriptHtml) { $scriptHtml } else { if ($debugPreference -ne 'SilentlyContinue') { return ('$' + $args[0].Groups[1]) } else { return ' ' } } }, "Multiline,IgnoreCase") $markdown = [Regex]::Replace($markdown, "\$\@\{([.\s\W\w\S]{1,})\}", { $a = $args $text = $a[0].Groups[1].ToString() $text = $text.Replace("<pre>", "").Replace("</pre>", "") $dataChunk = "@{$text}" $theData = Import-PSData -DataString $dataChunk $scriptHtml = $theData | Out-HTML if ($scriptHtml) { $scriptHtml } else { ("@{" + $args[0].Groups[1] + "}") } }, "Multiline,IgnoreCase") } $markDown = $markdown -ireplace "$([Environment]::NewLine)", " $([Environment]::NewLine)" #region Multiline Regex Replacement $replacements = @{ Find = '^#{6}([^#].+)#{6}', '^#{6}([^#].+)' Replace = '<h6>$1</h6> ' }, @{ Find = '^#{5}([^#].+)#{5}', '^#{5}([^#].+)' Replace = '<h5>$1</h5> ' }, @{ Find = '^#{4}([^#].+)#{4}', '^#{4}([^#].+)' Replace = '<h4>$1</h4> ' }, @{ Find = '^#{3}([^#].+)#{3}', '^#{3}([^#].+)' Replace = '<h3>$1</h3> ' }, @{ Find = '^#{2}([^#].+)#{2}', '^#{2}([^#].+)' Replace = '<h2>$1</h2> ' }, @{ Find = '^#{1}([^#].+)#{1}', '^#{1}([^#].+)' Replace = '<h1>$1</h1> ' }, @{ # Horizontal rules Find = '^\* \* \*', '^- - -' Replace = "$([Environment]::NewLine)<HR/>$([Environment]::NewLine)" }, @{ Find = '^(.+)\s={3,}' Replace = '<h1>$1</h1>' }, @{ Find = '^(.+)\s-{3,}' Replace = '<h2>$1</h2>' } $Markdown = $Markdown.Trim() foreach ($r in $replacements) { foreach ($f in $r.find) { $regex =New-Object Regex $f, "Multiline, IgnoreCase" $Markdown = $regex.Replace($markdown, $r.Replace) } } #endregion Multiline Regex Replacement #region Singleline Regex Replacement $markdown = $markdown -ireplace "$([Environment]::NewLine) $([Environment]::NewLine) $([Environment]::NewLine)", "$([Environment]::NewLine)<BR/><BR/>$([Environment]::NewLine)" -ireplace '-{3,}', "$([Environment]::NewLine)<HR/>$([Environment]::NewLine)" -ireplace '\*{3,}', "$([Environment]::NewLine)<HR/>$([Environment]::NewLine)" -ireplace '\*\*(.+?)\*\*', '<b>$1</b>' -ireplace '__(.+?)__', '<b>$1</b>' -ireplace '\*(.+?)\*', '<i>$1</i>' -ireplace '\s_(.+?)_\s', '<i>$1</i>' -ireplace '`(.+)` ', '<span style="font-family:Consolas, Courier New, monospace">$1</span> ' #endregion Singleline Regex Replacement # build link dictionary $linkrefs = @{} $re_linkrefs = [regex]"\[(?<ref>[0-9]+)\]\:\s*(?<url>https?[^\s]+)" $markdown = $re_linkrefs.Replace($Markdown, { param($linkref) $linkrefs[$linkref.groups["ref"].value] = $linkref.groups["url"].value }) # handle links, images - embedded or referenced $re_links = [regex]"(?<image>!\s?)?\[(?<text>[^\]]+)](?:\((?<url>[^)]+)\)|\[(?<ref>\d+)])" $markdown = $re_links.Replace($markdown, { param($link); $url = $link.groups["url"].value if (-not $url) { # url did not match, so grab from dictionary $url = $linkrefs[$link.groups["ref"].value] } $text = $link.groups["text"].value if ($link.groups["image"].success) { # image $format = '<img src="{0}" alt="{1}" />' $format -f $url, $text } else { # href $format = '<a href="{0}">{1}</a>' if (-not $ConvertLink) { $format -f "$url".Replace(" ", "%20"), $text } else { Write-Link -Url $url -Caption $text -Button -Style @{ "font-size" = "small" } } } }) $replacements = @(@{ Find = '^>(.+)<BR/>' Replace = '<blockquote>$1</blockquote><br/>' }) foreach ($r in $replacements) { foreach ($f in $r.find) { $regex =New-Object Regex $f, "Multiline, IgnoreCase" $Markdown = $regex.Replace($markdown, $r.Replace) } } $lines = @($Markdown -split ("[$([Environment]::NewLine)]") -ne "") $toReplace = @{} $inBlockQuote = $false $inNumberedList = $false $inList = $false $inInnerHTML = $false #region Fix Links and Code Sections $lines = @(foreach ($l in $lines) { if ($l -notlike "*#LinkTo*") { if ($l -match "^\d{1,}\.") { if (-not $inNumberedList) { "<ol>" } else { "</li>" } $numberedListItemOpen = $true "<li>" + $l.Substring($l.IndexOf(".") + 1) $inNumberedList = $true continue } else { if ($numberedListItemOpen) { "</li></ol>" $inList = $false $numberedListItemOpen = $false } } if ($l -match "^\s{0,3}\*{1}") { if (-not $inList) { "<ul>" } else { "</li>" } $listItemOpen = $true "<li>" + $l.Substring($l.IndexOf("*") + 1) $inList = $true continue } else { if ($listItemOpen) { "</li></ul>" $inList = $false $listItemOpen = $false } } if ($l.StartsWith(">")) { if (-not $inBlockQuote) { "<blockquote>" + $l.TrimStart(">") } else { $l.TrimStart(">") } $inBlockQuote = $true continue } if ((-not $inInnerHtml) -and $l.StartsWith("<")) { $inInnerHTML = $true } elseif ($inInnerHtml -and $l.StartsWith("</")) { $inInnerHTML = $false } if ($inBlockquote) { if ($l -like "*<br/>*") { $l -ireplace "<br/>", "</blockquote><br/>" $inBlockQuote = $false } else { $l } } elseif ($inNumberedList) { if ($l -notlike " *") { if ($l -ne '<BR/>') { "$l</ol>" $inNumberedList = $false } } else { $l } } elseif ($inList) { if ($l -and $l -notlike " *") { if ($l -ne '<BR/>') { "$l</ul>" $inList = $false } } else { $l } } else { if (($l.StartsWith(" ") -and $l.Trim() -and $l -notlike "*<*")) { if (-not $inCodeChunk) { "<pre>" } $l.TrimStart(" ") $inCodeChunk = $true continue } elseif ($InCodeChunk) { $inCodeChunk = $false "</pre>" } if ($inCodeChunk) { $inCodeChunk = $false "</pre>" } $l } } else { $first, $rest = $l -split ":" $first = $first.Replace("#LinkTo", "").Trim() $toReplace."@LinkTo${first}" = "$(($rest -join ':').Trim())" } } if ($numberedListItemOpen) { "</li></ol>" $inList = $false $numberedListItemOpen= $false } if ($listItemOpen) { "</li></ul>" $inList = $false $listItemOpen = $false }) if ($inCodeChunk) { $inCodeChunk = $false $lines += "</pre>" } $markdown = $lines -join ([Environment]::NewLine) foreach ($tr in $toReplace.Getenumerator()) { if (-not $tr) {continue } $markDown = $markDown -ireplace "$($tr.Key)", $tr.Value } #endregion Fix Links and Code Sections if ($scriptAsPowershell) { $markdown = [Regex]::Replace($markdown, "<pre[^>]*>([.\s\W\w\S]+)</pre>", { $scriptHtml = Write-ScriptHTML -Script $args[0].Groups[1] -ErrorAction SilentlyContinue if ($scriptHtml) { $scriptHtml } else { $args[0].Groups[1] } }, "Multiline,IgnoreCase") } if ($Splat) { $markdown = [Regex]::Replace($markdown, "\@([\w-]{1,})(\@\{([.\s\W\w\S]+)\}){0,}", { $a = $args $commandName = $args[0].Groups[1].ToString() $splatIt = $args[0].Groups[2].ToString() $commandName.Replace("<pre>", "").Replace("</pre>", "") $splatIt = "$splatIt".Replace("<pre>", "").Replace("</pre>", "") #$dataChunk = "@{$text}" $command = Get-Command -Name $commandName -ErrorAction SilentlyContinue $invokeWebCommandParams = @{} if ($pipeworksManifest -and $pipeworksManifest.WebCommand.$commandName) { $invokeWebCommandParams = $pipeworksManifest.WebCommand.$commandName } else { $invokeWebCommandParams = @{ShowHelp=$true} } if ($splatIt) { $theParams= & ([ScriptBlock]::Create("data { $dataChunk }")) $null = $invokeWebCommandParams.Remove("RunWithoutInput") $defaults = @{} +$theParams if ($invokeWebCommandParams.ParameterDefaultValue) { foreach ($kv in $invokeWebCommandParams.ParameterDefaultValue.GetEnumerator()) { if (-not $defaults[$kv.Key]) { $defaults[$kv.Key] = $kv.Value } } } if ($invokeWebCommandParams.DefaultValue) { foreach ($kv in $invokeWebCommandParams.DefaultValue.GetEnumerator()) { if (-not $defaults[$kv.Key]) { $defaults[$kv.Key] = $kv.Value } } } $scriptHtml = Invoke-WebCommand -Command $command -ParameterDefaultValue $defaults -RunWithoutInput @invokeWebCommandParams } else { $scriptHtml = Invoke-WebCommand -Command $command @invokeWebCommandParams } if ($scriptHtml) { $scriptHtml } else { $args[0].Groups[1] } }, "Multiline,IgnoreCase") } $markdown } } |